code: def test_create_edit_field():
      e1 = edit_field(
          name="ab", numpy_dtype=np.float64, shape=(2, 3), nullable=True
      )
      assert e1 == ("ab", np.float64, (2, 3), True)
  
file_path: petastorm/petastorm/tests/test_transform.py
imports: import numpy
  import pytest
  from petastorm.transform import edit_field, transform_schema, TransformSpec
  from petastorm.unischema import Unischema, UnischemaField
label_desc: Use image node_id 7 for calling a global function with example usage: test_create_edit_field() without return types